<template>
    <div class="page-login">
        <div class="page-login--layer page-login--layer-area">
            <ul class="circles">
                <li v-for="n in 10" :key="n"></li>
            </ul>
        </div>
        <div class="page-login--layer page-login--layer-time" flex="main:center cross:center">
            {{time}}
        </div>
        <div class="page-login--layer">
            <div class="page-login--content" flex="dir:top main:justify cross:center box:justify">
                <div class="page-login--content-header">
                    <p class="page-login--content-header-motto">
                        时间是一切财富中最宝贵的财富。 <span>—— 德奥弗拉斯多</span>
                    </p>
                </div>
                <div class="page-login--content-main" flex="dir:top main:center cross:center">
                    <!-- logo -->
                    <img class="page-login--logo" src="./image/logo@2x.png">
                    <!-- 表单 -->
                    <div class="page-login--form">
                        <el-card shadow="never">
                            <el-form ref="loginForm" label-position="top" :rules="rules" :model="formLogin" size="default">
                                <el-form-item prop="username">
                                    <el-input type="text" v-model="formLogin.username" placeholder="用户名">
                                        <i slot="prepend" class="fa fa-user-circle-o"></i>
                                    </el-input>
                                </el-form-item>
                                <el-form-item prop="password">
                                    <el-input type="password" v-model="formLogin.password" placeholder="密码">
                                        <i slot="prepend" class="fa fa-keyboard-o"></i>
                                    </el-input>
                                </el-form-item>
                                <el-form-item prop="code">
                                    <el-input type="text" v-model="formLogin.code" placeholder="- - - -">
                                        <template slot="prepend">验证码</template>
                                        <template slot="append">
                                            <img class="login-code" src="./image/login-code.png">
                                        </template>
                                    </el-input>
                                </el-form-item>
                                <el-button size="default" @click="submit" type="primary" class="button-login">登录</el-button>
                            </el-form>
                        </el-card>
                        <p class="page-login--options" flex="main:justify cross:center">
                            <span>
                                <!-- <d2-icon name="question-circle" /> --> 忘记密码</span>
                            <span>注册用户</span>
                        </p>
                        <!-- 快速登录按钮 -->
                        <el-button class="page-login--quick" size="default" type="info" @click="dialogVisible = true">
                            快速选择用户（测试功能）
                        </el-button>
                    </div>
                </div>
                <div class="page-login--content-footer">
                    <p class="page-login--content-footer-options">
                        <a href="#">帮助</a>
                        <a href="#">隐私</a>
                        <a href="#">条款</a>
                    </p>
                    <p class="page-login--content-footer-copyright">
                        Copyright
                        <!-- <d2-icon name="copyright" /> --> 2018 D2 Projects 开源组织出品 <a href="https://github.com/FairyEver">@FairyEver</a>
                    </p>
                </div>
            </div>
        </div>
        <el-dialog title="快速选择用户" :visible.sync="dialogVisible" width="400px">
            <el-row :gutter="10" style="margin: -20px 0px -10px 0px;">
                <el-col v-for="(user, index) in users" :key="index" :span="8">
                    <div class="page-login--quick-user" @click="handleUserBtnClick(user)">
                        <!-- <d2-icon name="user-circle-o" /> -->
                        <span>{{user.name}}</span>
                    </div>
                </el-col>
            </el-row>
        </el-dialog>
    </div>
</template>
<script>
import dayjs from 'dayjs'
import { mapActions } from 'vuex'
export default {
    data() {
        return {
            timeInterval: null,
            time: dayjs().format('HH:mm:ss'),
            // 快速选择用户
            dialogVisible: false,
            users: [{
                    name: '管理员',
                    username: 'admin',
                    password: 'admin'
                },
                {
                    name: '编辑',
                    username: 'editor',
                    password: 'editor'
                },
                {
                    name: '用户1',
                    username: 'user1',
                    password: 'user1'
                }
            ],
            // 表单
            formLogin: {
                username: 'admin',
                password: 'admin',
                code: 'v9am'
            },
            // 校验
            rules: {
                username: [
                    { required: true, message: '请输入用户名', trigger: 'blur' }
                ],
                password: [
                    { required: true, message: '请输入密码', trigger: 'blur' }
                ],
                code: [
                    { required: true, message: '请输入验证码', trigger: 'blur' }
                ]
            }
        }
    },
    mounted() {
        this.timeInterval = setInterval(() => {
            this.refreshTime()
        }, 1000)
    },
    beforeDestroy() {
        clearInterval(this.timeInterval)
    },
    methods: {
        ...mapActions('d2admin/account', [
            'login'
        ]),
        refreshTime() {
            this.time = dayjs().format('HH:mm:ss')
        },
        /**
         * @description 接收选择一个用户快速登录的事件
         * @param {Object} user 用户信息
         */
        handleUserBtnClick(user) {
            this.formLogin.username = user.username
            this.formLogin.password = user.password
            this.submit()
        },
        /**
         * @description 提交表单
         */
        // 提交登录信息
        submit() {
            this.$refs.loginForm.validate((valid) => {
                if (valid) {
                    // 登录
                    // 注意 这里的演示没有传验证码
                    // 具体需要传递的数据请自行修改代码
                    this.login({
                            username: this.formLogin.username,
                            password: this.formLogin.password
                        })
                        .then(() => {
                            
                            // 重定向对象不存在则返回顶层路径
                            this.$router.replace(this.$route.query.redirect || '/')
                        })
                } else {
                    // 登录表单校验失败
                    this.$message.error('表单校验失败')
                }
            })
        }
    }
}

</script>
<style lang="less">
@color-bg: #fff;
@color-primary: #48f;
@color-text-normal: #000;
@color-text-sub: #999;
@backgroundColor: #F0F2F5;
.page-login {
    background-color: @backgroundColor;
    height: 100%;
    position: relative;

    // 层
    .page-login--layer {
        overflow: auto;
    }

    .page-login--layer-area {
        overflow: hidden;
    }

    // 时间
    .page-login--layer-time {
        font-size: 24em;
        font-weight: bold;
        color: rgba(0, 0, 0, 0.03);
        overflow: hidden;
    }

    // 登陆页面控件的容器
    .page-login--content {
        height: 100%;
        min-height: 500px;
    }

    // header
    .page-login--content-header {
        padding: 1em 0;

        .page-login--content-header-motto {
            margin: 0px;
            padding: 0px;
            color: @color-text-normal;
            text-align: center;
            font-size: 12px;

            span {
                color: @color-text-sub;
            }
        }
    }

    // main
    .page-login--logo {
        width: 240px;
        margin-bottom: 2em;
        margin-top: -2em;
    }

    // 登录表单
    .page-login--form {
        width: 280px;

        // 卡片
        .el-card {
            margin-bottom: 15px;
        }

        // 登录按钮
        .button-login {
            width: 100%;
        }

        // 输入框左边的图表区域缩窄
        .el-input-group__prepend {
            padding: 0px 14px;
        }

        .login-code {
            height: 40px - 2px;
            display: block;
            margin: 0px -20px;
            border-top-right-radius: 2px;
            border-bottom-right-radius: 2px;
        }

        // 登陆选项
        .page-login--options {
            margin: 0px;
            padding: 0px;
            font-size: 14px;
            color: @color-primary;
            margin-bottom: 15px;
            font-weight: bold;
        }

        .page-login--quick {
            width: 100%;
        }
    }

    // 快速选择用户面板
    .page-login--quick-user {
        padding: 10px 0px;
        border-radius: 4px;

        &:hover {
            background-color: @color-bg;

            i {
                color: @color-text-normal;
            }

            span {
                color: @color-text-normal;
            }
        }

        i {
            font-size: 36px;
            color: @color-text-sub;
        }

        span {
            font-size: 12px;
            margin-top: 10px;
            color: @color-text-sub;
        }
    }

    // footer
    .page-login--content-footer {
        padding: 1em 0;

        .page-login--content-footer-options {
            padding: 0px;
            margin: 0px;
            margin-bottom: 10px;
            font-size: 14px;
            text-align: center;

            a {
                color: @color-text-normal;
                margin: 0 1em;
            }
        }

        .page-login--content-footer-copyright {
            padding: 0px;
            margin: 0px;
            font-size: 12px;
            color: @color-text-normal;

            a {
                color: @color-text-normal;
            }
        }
    }

    // 背景
    .circles {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;

        li {
            position: absolute;
            display: block;
            list-style: none;
            width: 20px;
            height: 20px;
            background: #FFF;
            animation: animate 25s linear infinite;
            bottom: -200px;

            @keyframes animate {
                0% {
                    transform: translateY(0) rotate(0deg);
                    opacity: 1;
                    border-radius: 0;
                }

                100% {
                    transform: translateY(-1000px) rotate(720deg);
                    opacity: 0;
                    border-radius: 50%;
                }
            }

            &:nth-child(1) {
                left: 15%;
                width: 80px;
                height: 80px;
                animation-delay: 0s;
            }

            &:nth-child(2) {
                left: 5%;
                width: 20px;
                height: 20px;
                animation-delay: 2s;
                animation-duration: 12s;
            }

            &:nth-child(3) {
                left: 70%;
                width: 20px;
                height: 20px;
                animation-delay: 4s;
            }

            &:nth-child(4) {
                left: 40%;
                width: 60px;
                height: 60px;
                animation-delay: 0s;
                animation-duration: 18s;
            }

            &:nth-child(5) {
                left: 65%;
                width: 20px;
                height: 20px;
                animation-delay: 0s;
            }

            &:nth-child(6) {
                left: 75%;
                width: 150px;
                height: 150px;
                animation-delay: 3s;
            }

            &:nth-child(7) {
                left: 35%;
                width: 200px;
                height: 200px;
                animation-delay: 7s;
            }

            &:nth-child(8) {
                left: 50%;
                width: 25px;
                height: 25px;
                animation-delay: 15s;
                animation-duration: 45s;
            }

            &:nth-child(9) {
                left: 20%;
                width: 15px;
                height: 15px;
                animation-delay: 2s;
                animation-duration: 35s;
            }

            &:nth-child(10) {
                left: 85%;
                width: 150px;
                height: 150px;
                animation-delay: 0s;
                animation-duration: 11s;
            }
        }
    }
}

</style>
